sorting

from the tutorial on 'different kinds of entries', i understand it's possible to format entries differently based on mood. Is it then possible to have a url (in a component box), which would filter your journal to only display entries with a specific mood?

Also, I've made my comments into images by using an href link to $.read_url. I've found backward_url and forward_url in the documentation is part of RecentNav Class, but I'm unsure how to use these to define an image for moving backwards or forwards in a free_text component.Can anyone help with defining the code?